Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. User equipment of a radio communication system provided with a base station and the user equipment, the user equipment comprising: a reporting unit that reports, to the base station, a band combination supported by the user equipment, a MIMO layer number, and a modulation scheme, and a UE category supported by the user equipment; a receiver that receives, upon detecting that a maximum number of bits within one transmission time interval (TTI) that is achievable by carrier aggregation performed with the band combination supported by the user equipment, the MIMO layer number, and the modulation scheme exceeds a maximum number of bits within one TTI to be supported by the UE category supported by the user equipment, a transport block from the base station with a number of bits within one TTI that is less than or equal to the maximum number of bits within one TTI to be supported by the user equipment under the UE category; and a decoder that decodes, when the transport block is decoded, the transport block based on a number of bits within one TTI that is reduced compared with the maximum number of bits within one TTI that is achievable with the band combination, the MIMO layer number, and the modulation scheme reported to the base station, wherein the UE category supported by the user equipment includes at least one of DL Category 15 and DL Category 16, and wherein the maximum number of bits within the one TTI to be supported by the user equipment under the DL Category 15 is 798,800 bits, and the maximum number of bits within the one TTI to be supported by the user equipment under the DL Category 16 is 1,051,360 bits.
User equipment (UE) in a radio communication system communicates with a base station using carrier aggregation, multiple-input multiple-output (MIMO) layers, and modulation schemes. The UE reports its supported band combination, MIMO layer number, modulation scheme, and UE category to the base station. The UE category determines the maximum number of bits the UE can process within one transmission time interval (TTI). If the achievable bit rate from the reported parameters exceeds the UE category's limit, the base station transmits a transport block with a reduced bit count. The UE decodes the transport block based on this reduced bit count rather than the higher achievable rate. This applies to UE categories DL Category 15 (supporting up to 798,800 bits per TTI) and DL Category 16 (supporting up to 1,051,360 bits per TTI). The system ensures compatibility between high-capability configurations and UE limitations, preventing overloading the UE's processing capacity while maintaining efficient data transmission.
2. A base station of a radio communication system provided with the base station and user equipment, the base station comprising: a storage that stores, for each UE category of the user equipment, a maximum number of bits within one transmission time interval (TTI) to be supported by the user equipment; a retrieval unit that retrieves UE capability of the user equipment; and a scheduler that performs, in response to detecting that a carrier aggregation is to be performed and that a UE category included in the retrieved UE capability of the user equipment is a specific UE category, scheduling within a range that does not exceed the maximum number of bits within one TTI to be supported by the user equipment under the specific UE category, wherein, when a carrier aggregation is performed with a predetermined band combination, a predetermined MIMO layer number, and a predetermined modulation scheme included in the UE capability retrieved from the user equipment, and upon detecting that a maximum number of bits within one TTI that is achievable by the carrier aggregation performed with the predetermined band combination, the predetermined MIMO layer number, and the predetermined modulation scheme exceeds an upper limit of the maximum number of bits within one TTI with a predetermined range that is to be supported by the user equipment under the specific UE category, the scheduler performs scheduling within a range that does not exceed the upper limit of the maximum number of bits within one TTI with the predetermined range that is to be supported by the user equipment under the specific UE category, wherein the specific UE category includes at least one of DL Category 15 and DL Category 16, and wherein the upper limit of the maximum number of bits within the one TTI with the predetermined range that is to be supported by the user equipment under the DL Category 15 is 798,800 bits, and the upper limit of the maximum number of bits within the one TTI with the predetermined range that is to be supported by the user equipment under the DL Category 16 is 1,051,360 bits.
A base station in a radio communication system manages data transmission to user equipment (UE) by enforcing bit rate limits based on UE category. The system stores predefined maximum bit limits per transmission time interval (TTI) for different UE categories, such as DL Category 15 (798,800 bits) and DL Category 16 (1,051,360 bits). When carrier aggregation is used, the base station retrieves the UE's capability information, including supported band combinations, MIMO layer numbers, and modulation schemes. If the calculated maximum bits per TTI for the UE's configuration exceeds the category-specific limit, the scheduler adjusts scheduling to ensure the transmitted data does not surpass the predefined maximum. This prevents overloading the UE while optimizing data throughput for supported configurations. The solution ensures compatibility with advanced UE categories while maintaining system stability.
3. A communication method executed by user equipment of a radio communication system provided with a base station and the user equipment, the communication method comprising: reporting, to the base station, a band combination supported by the user equipment, a MIMO layer number, and a modulation scheme, and a UE category supported by the user equipment; and upon detecting that a maximum number of bits within one transmission time interval (TTI) that is achievable by a carrier aggregation performed with the band combination supported by the user equipment, the MIMO layer number, and the modulation scheme exceeds a maximum number of bits within one TTI to be supported by the UE category supported by the user equipment, receiving, from the base station, a transport block with a number of bits within one TTI that is less than or equal to the maximum number of bits within one TTI to be supported by the user equipment under the UE category; and when the transport block is decoded, decoding the transport block based on a number of bits within one TTI that is reduced compared with the maximum number of bits within one TTI that is achievable with the band combination, the MIMO layer number, and the modulation scheme that are reported to the base station, wherein the UE category supported by the user equipment includes at least one of DL Category 15 and DL Category 16, and wherein the maximum number of bits within the one TTI to be supported by the user equipment under the DL Category 15 is 798,800 bits, and the maximum number of bits within the one TTI to be supported by the user equipment under the DL Category 16 is 1,051,360 bits.
In radio communication systems, user equipment (UE) and base stations must efficiently manage data transmission rates while adhering to UE category limitations. The invention addresses the challenge of optimizing transport block sizes when carrier aggregation, MIMO layer configurations, and modulation schemes exceed the maximum bit capacity defined by the UE's category. The method involves the UE reporting its supported band combination, MIMO layer number, modulation scheme, and UE category to the base station. If the achievable bit rate within one transmission time interval (TTI) via carrier aggregation surpasses the UE category's maximum supported bits (e.g., 798,800 bits for DL Category 15 or 1,051,360 bits for DL Category 16), the base station transmits a transport block with a reduced bit count. Upon receiving the transport block, the UE decodes it based on the reduced bit count rather than the higher achievable rate. This ensures compatibility with the UE's category while maintaining efficient data transmission. The solution prevents overloading the UE by dynamically adjusting transport block sizes to match the UE's supported capacity, particularly for advanced categories like DL Category 15 and 16.
Unknown
September 22, 2020
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.